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The Incircle and the Altitudes of a Triangle
Let ABC be a triangle, AA', BB', and CC' be the altitudes, and
the inradius. Then
.
Contributed by:
Jay Warendorff
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See Theorem 136 in N. Altshiller-Court,
College Geometry
, Mineola, NY: Dover, 2007 p. 79.
RELATED LINKS
Altitude
(
Wolfram
MathWorld
)
Incircle
(
Wolfram
MathWorld
)
Inradius
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
The Incircle and the Altitudes of a Triangle
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/TheIncircleAndTheAltitudesOfATriangle/
Contributed by:
Jay Warendorff
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